package main

import (
	"fmt"
)

func main() {
	m := make(map[string]int)
	m["k1"] = 7
	m["k2"] = 13
	fmt.Println("map:", m)

	v1 := m["k1"]
	fmt.Println("v1:", v1)

	v3 := m["k3"]
	fmt.Println("v3:", v3)

	fmt.Println("len:", len(m))

	delete(m, "k2")

	fmt.Println("map:", m)

	clear(m)
}
